Question

In pea plants, round seeds are dominant and wrinkled seeds are recessive. A pea plant with round seeds was pollinated with a pea plant with wrinkled seeds. The offspring produced round seeds. One of the offspring was mated with a pea plant with heterozygous genes for round seeds. What are the chances that the offspring will have wrinkled seeds?There is a percent chance that the offspring will have wrinkled seeds.

Answer 1

1/4 or 25% will have wrinkled seeds

Answer 2

There are 25 percent chances that the offspring will have wrinkled seeds.

Step-by-step explanation:

Let the allele representing round seed of pea plant be "R"

and allele representing wrinkled seed of pea plant be "r"

Also it is given that round seeds are dominant and wrinkled seeds are recessive

First generation cross -

A pea plant with round seeds was pollinated with a pea plant with wrinkled seeds.

which means RR x rr

Thus all the offspring has heterozygous round genotype Rr

Second generation cross

One of the offspring was mated with a pea plant with heterozygous genes for round seeds.

So this time the cross is between Rr and Rr

Rr x Rr

RR, Rr, Rr, rr

out of 4 offspring, 1 offspring with genotype "rr" is wrinkled

Thus, there are 25 percent chances that the offspring will have wrinkled seeds.